package org.crc.myvhrb.config;

import com.fasterxml.jackson.databind.ObjectMapper;
import org.crc.myvhrb.model.Hr;
import org.crc.myvhrb.model.RespBean;
import org.crc.myvhrb.service.HrService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.*;
import org.springframework.security.config.annotation.ObjectPostProcessor;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.builders.WebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.access.intercept.FilterSecurityInterceptor;
import org.springframework.security.web.authentication.AuthenticationFailureHandler;
import org.springframework.security.web.authentication.AuthenticationSuccessHandler;
import org.springframework.security.web.authentication.logout.LogoutSuccessHandler;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

/**
 * CRC
 * 2021/8/1
 */
@Configuration
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    HrService hrService;
    @Autowired
    CustomFilterInvocationSecurityMetadataSource customFilterInvocationSecurityMetadataSource;
    @Autowired
    CustomUrlDecisionManager customUrlDecisionManager;


    @Bean
    PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }


    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(hrService);
    }

    @Override
    public void configure(WebSecurity web) throws Exception {

        web.ignoring().antMatchers("/login");

    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {

        http.authorizeRequests()
                .withObjectPostProcessor(new ObjectPostProcessor<FilterSecurityInterceptor>() {
                    @Override
                    public <O extends FilterSecurityInterceptor> O postProcess(O o) {
                        o.setAccessDecisionManager(customUrlDecisionManager);
                        o.setSecurityMetadataSource(customFilterInvocationSecurityMetadataSource);
                        return o;
                    }
                })
                .and()
                .formLogin()
                .usernameParameter("username")
                .passwordParameter("password")
                .loginProcessingUrl("/doLogin")
                .loginPage("/login")
                .successHandler(new AuthenticationSuccessHandler() {
                    @Override
                    public void onAuthenticationSuccess(HttpServletRequest req, HttpServletResponse resp,
                                                        Authentication authentication) throws IOException,
                            ServletException {
                        // 设置响应体的数据类型和编码格式
                        resp.setContentType("application/json;charset=utf-8");
                        PrintWriter out = resp.getWriter();
                        // 从 authentication 中获取用户信息
                        Hr hr = (Hr) authentication.getPrincipal();
                        // 设置返回信息的用户密码为 null，避免被恶意拦截
                        hr.setPassword("");
                        // 设置返回信息
                        RespBean success = RespBean.success("登录成功", hr);
                        // 将对象转成字符串
                        String s = new ObjectMapper().writeValueAsString(success);
                        out.write(s);
                        out.flush();
                        out.close();
                    }
                })
                .failureHandler(new AuthenticationFailureHandler() {
                    @Override
                    public void onAuthenticationFailure(HttpServletRequest req,
                                                        HttpServletResponse resp,
                                                        AuthenticationException e) throws IOException,
                            ServletException {
                        resp.setContentType("application/json;charset=utf-8");
                        PrintWriter out = resp.getWriter();
                        RespBean respBean = RespBean.error("登录失败！");
                        if (e instanceof LockedException) {
                            respBean.setMsg("账户被锁定，请联系管理员！");
                        } else if (e instanceof CredentialsExpiredException) {
                            respBean.setMsg("密码过期，请联系管理员！");
                        } else if (e instanceof AccountExpiredException) {
                            respBean.setMsg("账户过期，请联系管理员！");
                        } else if (e instanceof DisabledException) {
                            respBean.setMsg("账户被禁用，请联系管理员！");
                        } else if (e instanceof BadCredentialsException) {
                            respBean.setMsg("用户名或密码输入错误,请重新输入！");
                        }
                        out.write(new ObjectMapper().writeValueAsString(respBean));
                        out.flush();
                        out.close();
                    }
                })
                .permitAll()
                .and()
                .logout()
                .logoutSuccessHandler(new LogoutSuccessHandler() {
                    @Override
                    public void onLogoutSuccess(HttpServletRequest req,
                                                HttpServletResponse resp,
                                                Authentication authentication) throws IOException, ServletException {
                        resp.setContentType("application/json;charset=utf-8");
                        PrintWriter out = resp.getWriter();
                        Hr hr = (Hr) authentication.getPrincipal();
                        RespBean respBean = RespBean.success("注销成功！", hr);
                        out.write(new ObjectMapper().writeValueAsString(respBean));
                        out.flush();
                        out.close();
                    }
                })
                .permitAll()
                .and()
                .csrf().disable().exceptionHandling()
                // 没有认证时，在这里处理结构，不要重定向
                .authenticationEntryPoint((req,resp,authException) -> {
                    resp.setContentType("application/json;charset=utf-8");
                    resp.setStatus(401);
                    PrintWriter out = resp.getWriter();
                    RespBean respBean = RespBean.error("访问失败");
                    if (authException instanceof InsufficientAuthenticationException){
                        respBean.setMsg("请求失败，请联系管理员");
                    }
                    out.write(new ObjectMapper().writeValueAsString(respBean));
                    out.flush();
                    out.close();
                });
    }
}
